Bag Making Double Sided Heat Sealable BOPP Film

Bag Making Double Sided Heat Sealable BOPP Film is manufactured using an advanced multilayer co-extrusion formulation and precision biaxial orientation process. While maintaining high transparency and excellent printability, its surface layer incorporates a heat-sealing masterbatch specifically optimized for bag-making applications. Whether used for three-side-seal bags, four-side-seal bags, back-seal bags, or stand-up pouches, the film is designed to work smoothly with various bag-making and packaging machines, enabling fast, strong, and flat sealing.

It effectively addresses common bag-making problems such as air leakage, wrinkling, and sealing-knife sticking, helping improve finished-bag yield, production efficiency, and overall packaging quality.

Technical Specifications

What Are the Competitive Advantages of Our Film?

Excellent Contaminant-Tolerant Heat-Sealing Performance:

The Bag Making Double Sided Heat Sealable BOPP Film is designed with excellent tolerance to contamination during heat sealing, helping address a common challenge in packaging applications for milk powder, coffee powder, seasonings, pharmaceutical powders, and other fine-particle products. Even when powder or fine particles become trapped in the sealing area during filling, its high instantaneous Hot Tack strength helps achieve reliable sealing, reducing the risk of weak seals, false sealing, and air leakage. The seal remains stable without springing back after sealing.

Stable Low Friction & Excellent Opening Performance:

The film combines a stable low coefficient of friction with excellent opening properties. By precisely controlling the migration rate of slip agents in the surface layer, the film is designed to maintain good opening performance even after prolonged storage and long-distance ocean transportation. Smooth film feeding helps prevent sticking to sealing knives caused by tensile deformation when high-speed filling and bag-making equipment operates under heavy loads.

Food & Medical-Grade Cleanliness:

The film is manufactured to meet stringent cleanliness and safety requirements for food and medical packaging applications. As an intelligent manufacturing facility in Tianjin, HUA HENG uses electric forklifts throughout internal factory logistics, replacing traditional fuel-powered forklifts. This helps prevent the film from being exposed to industrial exhaust, residues, and oil contamination during slitting and warehouse dispatch, supporting the stringent cleanliness requirements of food, pharmaceutical, and medical packaging materials.

After-Sales & Service Support

Comprehensive Pre-Sales Solution Customization:

Different models of continuous high-speed bag-making machines, vertical form-fill-seal (VFFS) machines, and horizontal form-fill-seal (HFFS) machines have different requirements for film web tension, coefficient of friction (COF), and Hot Tack strength. Before you place an order, our flexible packaging engineers will work closely with you to analyze key process parameters, including knife pressure, heat-sealing time, sealing temperature, and packaging speed. Based on these requirements, we can customize the slip-agent formulation and heat-sealing window to minimize the risk of edge bursting and wrinkling during bag making.

Exclusive “Pilot Simulation & Sample Testing” Service:

Supported by the advanced flexible pilot production line at our intelligent manufacturing facility, HUA HENG can simulate the actual operating conditions of mainstream bag-making machines worldwide. Before mass production, we can provide customized samples of 10–50 kg for online trial runs at your facility. At the same time, our laboratory conducts tensile strength, haze, and surface tension testing to help ensure that sample performance remains consistent with mass-produced batches.

24-Hour Digital Roll-by-Roll Traceability:

Through HUA HENG's independently developed digital energy and carbon management and intelligent production platform, every roll of bag-making heat-sealable film leaving our factory is assigned a unique digital identification code. The system records key production data in real time, including temperature-control parameters on the Brückner orientation line, thickness fluctuation curves from the intelligent online thickness measurement system (strictly controlled within ±0.5 μm), and the initial corona-treatment value recorded during slitting.

If your production line reports any quality issue, we can retrieve the complete underlying production data for the relevant batch within 24 hours, enabling our technical team to identify potential causes quickly and provide targeted improvement solutions.

Rapid International Quality Complaint Response:

International sea transportation can involve complex conditions, including extreme changes in temperature and humidity inside containers. If you discover issues after receiving the goods, such as core deformation caused by transportation conditions, abnormal corona-value degradation below the ≥38 mN/m processing standard, or incomplete heat sealing, please contact your dedicated customer service manager immediately.

After receiving your images and on-site production data, our technical experts will initiate a cross-border online video consultation within 24 hours. If the issue is confirmed to result from a manufacturing or protective-packaging defect attributable to HUA HENG, we commit to arranging full replacement at the shortest available lead time or providing compensation according to the agreed terms.

Frequently Asked Questions

Q1: What Applications Is the Film Suitable For?

Snack Food Bag Making: Suitable for three-side-seal and four-side-seal bags for puffed snacks, biscuits, nuts, candies, and other snack foods. It combines high transparency and a premium visual appearance with strong, reliable sealing performance.

Daily Chemical & Personal Care Packaging: Suitable for facial mask packaging, hair and body care products, tissue outer packaging, and other daily chemical applications, providing flat, attractive bag shapes and reliable moisture-resistant sealing.

Pharmaceutical & Healthcare Packaging: Suitable for pharmaceutical tablets, dietary supplements, individually packed face masks, and similar applications. It supports reliable sealing and packaging security during high-speed bag-making operations.

Powder & Granule Packaging: Suitable for milk powder, coffee powder, seasonings, and other fine-particle products. Its excellent contaminant-tolerant heat-sealing performance helps maintain reliable seals and reduce air leakage even when powder or fine particles enter the sealing area.

Q2: Can the BOPP Double-Sided Heat-Sealable Film for Bag Making Be Customized?

Yes. The film can be customized according to your bag-making machine model, production speed, and filling material characteristics. HUA HENG can flexibly adjust the film thickness, heat-sealing temperature, Hot Tack strength, and coefficient of friction to provide a dedicated heat-sealable BOPP film solution for your bag-making process.

Q3: What Is the MOQ, Packaging Method, Lead Time, and Payment Terms?

The standard MOQ is 1,000 kg. The film is supplied with a suspended shaft or paper tube core, together with moisture-proof film, stretch film, and pallets, making it suitable for long-distance ocean and land transportation.

The standard lead time is 15–20 days after order confirmation. For conventional specifications with safety stock available, delivery can be shortened to 7–10 days.

Payment terms are T/T 30% deposit, with the balance paid before shipment.

Q4: How Does the Film Prevent Wrinkling and Local Thermal Perforation at the Bottom Seal of Stand-Up Pouches During High-Temperature Pressing?

These problems are typically caused by excessive thermal shrinkage or uneven film thickness, which can result in uneven heat transfer and localized stress concentration during high-temperature sealing.

HUA HENG uses a digital energy and carbon management platform to precisely control the biaxial orientation and crystallinity of the BOPP film during the stretching process. Combined with an exceptionally low thickness deviation of ±0.5 μm, the Bag Making Double Sided Heat Sealable BOPP Film achieves more uniform heat distribution across the sealing area during high-temperature pressing.

This helps minimize bottom-seal wrinkling, localized thermal perforation, and sealing defects, supporting more stable stand-up pouch forming and improving finished-bag quality in high-speed production.